Sieve-cleaner.



m. 874,033.05 'PATENTED 9110.17; 1901.

J. OLSEN.

SIEVE CLEANER. APPLICATION FILED MAY 6. i907.

. WITNESSES INVENTOR.

Z W MW 652%? ATTORNEXfi i i 35' ticularly NrrEn STATE-SaPATENT orFion .lg 874,030; v-Specification of M: 1, =1 To ell tohom may 20mm: M Beltknpwn hat-I, JOHN OLsEN, a citizenj er the Unite States, residing atMilwaukee,

as essments-wa ker; and State'pf Wis 5 eonsin, have vented certain newan'd iiseful trmsrbwsmenr lSie've-Cleaners, of which,

a the, follo'wihg is specification, referencebe- 1""ingFhad tothecompanying drawing, formingspan-themes; p a a Z This iriverrtijonrelates more particularly to brush-es fOr cleanin'g' gyratory or shakingsieveshaving cloth tops and woven wire bottoms betweenwhi'ch thebrushesare con- I finedby the sieve frames in an inverted poframes; andgenerally to improve the construction and operation jiers of this classm It consists in ertain novel features of construction and in; thepeculiar arrangement andcombinationsof parts as hereinafter pardescribedand pointed out in the claims. q I .i 2: Inthe accompanyingdrawingshowing on an enlarged scale-a sieve cleaning brush embodyingtheginven-tijon, like letters designate 40'v the same partsinthe severalfigures. Figure 1. is a, plan view of the brush; Fig, 2 isfa sid'eeleyation of the same as viewed from the lower side with referencetoFig. 1; and Fig. 3 is a cross section on-the line 3 3, Fig. 1.

Sieve brushes of this class as usually made, have solid or disk shapedbacks or continuous annular frames, generally made of or reinforced bysheet metal and provided on the under side with bearings usually formedby downwardly pressed bulges inthe sheet metal. Such. brushes areusually quite heavy, and being comparatively inelastic, strike the sieveframes with sughsl we asto of sieve cloth clean- JOHN OLSEN, or ILWAKEE;Wisconsin}iassrenenvorljonn-nanr" ro WI'LLIAMIJ5 a eann was annonsnatrrro JOHN m-nnnon or an; 1. 5* w y 1 w V assassin ted o'o' "which"the brus as herein shown and described, is desi to avoid the objectionsand difficulties a ove necessitate lining them o eyel d, ra d wear AUKEEwIscoNsrn;

I and destruction not only of the sieve frames,

but of the brushes themselves. Being com parativelyhea and inelastic,the metal of frames are made or with which they are backed, soon becomescrystallized and brittle with the constant and violent striking of thebrushes against the sieve frames, so that from this cause brushes arefrequently broken. When the bearings on the'under side of the brushesare formed as above stated, by depressions in the sheet metal frames orbacks, their constant movement over the, woven wire supports or screenson which they rest, soon wears through the thickness of the sheet metal,removin the bearings and materially reducing if not estroying theefficiency of the brushes, and if such bearings are formed by the lugswhich hold the bristles or wipers, thewearing away, of the thickness ofthe sheet metal releases the bristles or wipers and renders the brushesinoperative.

The construction of the brush or cleaner mentioned. 4

Referring to the drawing, the cleaner or brush cons1sts of an openresilient frame a, and of flexible tufts or wipers b of bristles orother suitable material secured thereto by inwardly and upwardly bentlugs c. The frame a consists of a resilient band of metal or otherelastic material preferably bent into a proximately circular or annularshape, as s own, a gap or space being left between the free ends of theband to permit contraction or compression and vrecoil of the brush framewhen it strikes the sieveframe. One end of the band is bent transverselinward and forms an abutment or stop as shown in Fig. 1, for the otherend of the band to strike against, in order to prevent-contraction orcompression of the brush frame to such a degree as would destroy orreduce its resiliency or bend it beyond its capacity to resume itsoriginal form. The band is curved or extended downwardly at intervalsalong its lower edge to form bearings e, as shown in Figs. 2 and 3, tocome in contact with the woven wire sieve bottom or brush support,

and to give the tufts or wipers an oscil atory or rocklng movementagainst the sieve cloth as said bearings ride over the elevations andide ressions in said woven wire support.

etween the bearings e the narrower pats :ciency increased.

of the band are formed with inwardly and upwardly bent lugs c forholding the tufts or wipers. The lower parts of these lugs where theyjoin the lower edge of he band being thus elevated out of contact withthe woven Wire brush support or screen of the sieve frame, are preventedfrom being worn away and releasing the tufts or wipers, the edgewisedisposition of said bearings with relation to said support or screenaffording ample material for wear before the lugs can come in contactwith and be subjected to abrasion by said support or screen. The'life ofthe brush is thus materially prolonged and its effi- The bristles,fibers or other material of l which the tufts orwipers are composed, are

preferably folded into and held by light sheet metal strips f incontinuous or long bands, and these bands are cut into sectionsorwipers. of the desired lengths, which are 'clas ed to the inner side ofthe frame a by the ugs c, as shown in Fig. 3, the free ends or edges ofthe tufts or'wipers projecting upwardly' some distance above the frameso as to reach and effectively clean the entire area .of cloth withinthe sieve frame. f

The brush is preferably provided with two of'these tufts or wipers,arranged substantially as shown in Fig. 1, so that with sagcloth thebrush will tend to swing around one of them as a pivot, and thus workitself free, avoiding the objection to brushes having continuous ringsof bristles or the like or three or more symmetrically arranged tufts orwipers into or between which saggi. cloth tends to settle and thuspreventtne free movement of the brushes so made.

'The brush constructed as herein shown and described being very lightand elastic, recoils quickly when it strikes the sieve frame and is moreactive and efficient in operation,

covering more area in a given time than the heavier and comparativelylnelastic brushes or cleaners in general use.

In case the tufts or wipers are cut or worn off or are otherwise injuredand become defective before the brush frame is worn out, they can bereadily renewed by bendin the lugs c slightly inward, removing tl. e tufts -or wipers thus released, "and replacing them with new ones.

I claim: I I I A 1. A sieve cleaner having an elastic frame open on oneside and provided with a wiper projecting upwardly therefrom,substantially as described.

2. A sieve cleaner comprising a curved elastic frame open on one sideand provided with'a number of separate upwardly projecting wipers,substantially as described.

3. i sieve cleaner comprising a frame consisting of a curved elastlcmeta-lband open on one side and having inwardly and upwardly bent lugsand wipers clasped between said band and lugs and projectin upwardlytherefrom, substantially as described.

4. A sieve cleaner comprising a resilient frame consisting of .a curvedmetal band openon one side andformed at intervals along its lower edgewithdownwardly extending bearings and between said bearings withinwardly and upwardly bent lugs, and Y 'wipers clasped between said bandand lugs and projecting upwardly therefrom, substantially'as described;

5. A sieve cleaner'c'omprisin frame consisting of'an open e astic metalband bent into approximately annular shape one of its free ends beingbent inwardly and forming a transverse striking abutment opposite theother end, and-a wiper secured to said band 'and rojecting upwardlytherefrom, substantia ly as described.

6. A sieve cleaner comprising an elastic annular metal band severed onone slde and formed at intervals along its lower edge with downwardlyextending bearings and between said bearings with inwardly and upwardlybent lugs and wipers clasped between said lugs and band and projecting uwardly therefrom, substantially as describe 7. In a sieve cleaner thecombination of an open' curved elastic metal frame formed at intervalswith inwardly and upwardly bent' a resilient I

